2 * Copyright (c) 2017 Andrew Turner
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _MACHINE__UNDEFINED_H_
34 #define _MACHINE__UNDEFINED_H_
36 typedef int (*undef_handler_t)(vm_offset_t, uint32_t, struct trapframe *,
39 #define MRS_MASK 0xfff00000
40 #define MRS_VALUE 0xd5300000
41 #define MRS_SPECIAL(insn) ((insn) & 0x000fffe0)
42 #define MRS_REGISTER(insn) ((insn) & 0x0000001f)
43 #define MRS_Op0_SHIFT 19
44 #define MRS_Op0_MASK 0x00080000
45 #define MRS_Op1_SHIFT 16
46 #define MRS_Op1_MASK 0x00070000
47 #define MRS_CRn_SHIFT 12
48 #define MRS_CRn_MASK 0x0000f000
49 #define MRS_CRm_SHIFT 8
50 #define MRS_CRm_MASK 0x00000f00
51 #define MRS_Op2_SHIFT 5
52 #define MRS_Op2_MASK 0x000000e0
53 #define MRS_Rt_SHIFT 0
54 #define MRS_Rt_MASK 0x0000001f
57 mrs_Op0(uint32_t insn)
60 /* op0 is encoded without the top bit in a mrs instruction */
61 return (2 | ((insn & MRS_Op0_MASK) >> MRS_Op0_SHIFT));
66 mrs_##op(uint32_t insn) \
69 return ((insn & MRS_##op##_MASK) >> MRS_##op##_SHIFT); \
76 void undef_init(void);
77 void *install_undef_handler(bool, undef_handler_t);
78 void remove_undef_handler(void *);
79 int undef_insn(u_int, struct trapframe *);